Remove "Moved Document from ..." notice in Phriction
This banner isn't particularly useful, and it's distracting and it isn't obvious how to dismiss it, and making a trivial edit to dismiss it is awkward.
This information is also already available in the transaction log.
Just remove this banner since it doesn't really serve any clear purpose.
- Moved a page in Phriction, then loaded the destination page. Before change: header banner. After change: nothing.
- Viewed a normal (non-moved) page, saw normal behavior.
- Reviewed transactions, saw "Moved from ..." in the timeline.
Maniphest Tasks: T13410
Differential Revision: https://secure.phabricator.com/D20800